Hi,
I am trying to convert a novel by Brad Thor from AZW3 to AZW3. It has spaces between the paragraphs, and soft scene breaks. I tried doing what I usually do in this situation, which is to do an AZW3-AZW3 conversion, removing the margins, and then another AZW£-AZW3 conversion removing the paragraphs. This usually works, and I end up with a book that has no spaces between the paragraphs, but has scene breaks. This time, with this book, it isn't working. Could someone possibly give me some tips on what to do? If it has anything to do with css you'll have to really spell it out, as I am not css savvy.

Try to use the heuristics. I use the german version, so I can't see how it is named, but there should be an option to format scene breaks. You could insert some characters to indicate them. If you use this option, scene breaks should be conserved. If you want a blank line, you could use sigil afterwards and replace the characters with a &bnsp.